Heating installation



` Dec`. 26, 1933. R, B, POINDEXTER HEATING INSTALLATION Filed Sept. 13, 1928 2 Sheets-Sheet l bec. 26, 1933.

R. B. POINDEXTER HEATING INSTALLATION Filed Sept. A2 Sheets-Sheet 2 'Illl Illlll vlllrlll/lgllllly/lnllg l /l//l WM t i Q Patented Dec. 26, 1933 n n YA-ppl'it'zation September 13, 1928 i vSt'tlilll N0. 3055714y Claims. (o1. 21a-itilA 1'@ m invention relates toY electrically" heating liquids. y 4 A i This invention has utility when-incorporated in 4power or "heating Ainstallations for buildings. Referring to the drawings: f j Y Y y Figi is a"fragmentary view of anexnbodiment ofthe invention in a heating plant installation 'of thesteam type or rsog-called vapori..` 4. Fig.A 2`is apreheater, in vertical section, as incorporated in Fig.j1;` i

,Fia 3 iS ,a ,View on thlne III-411) Fig: 1:' ^Fig. 4 is a view in vertical sectiorrthroughthe Supply Control valve: L 1 e n l, 5 is a view in vertical section through the bcilero'f Fig. 5;y Q i i f 6v is a fragmentaryview of .the heater controller for the installation of Fig.` 1; .A Fig. '7. is 0an.fragrnentary `view of the-:electric heater as connected up in a hot water plant heating installation; Fig. 8 is a detail view and Fig. 9 is a wiring diagram of the electrical features of the controller.

Water supply line 1 from say a tank of the range boilertype, is shown as extending to coil 2 in preheater chamber 3 and from thence viavline 4 past manually operable valve 5 -into reservoir 6. Any discharge flow of water by the line 4 checked by the valve 5 may return to the supply tank. vThe discharge flow from this supply is regulated automatically vherein for the maintenance of a constant volume reserve in the reservoir 6 by valve 7 as actuated by float 8 (Figs. 1, 4). Limit stop 8' precludes rocking of the taper valve stem reversely.` Expansible packing '1' keeps the valve snugly seated. Hand hole 6f allows access for adjustment of the valve '1.

of the heaterof Fig. 7;

The warm liquid in the reservoir 6 may iiow by duct 9 into housing 10 providing a chamber 11. The reservoir 6 has av drain `or draw oi line 13 with shut off valve 14 therein. This draw of! line terminates at spigot 15. Back o! this spigot 15 this line 13 is connected by duct 16 with the chamber 11. Accordingly at all times opening of the spigot 15 serves to drain the chamber 11, but opening of the spigot 15 only serves to drain the reservoir 6V when the valve 14 is also open. Withthe valve 14open and the valve 15 closed, there may be flow `through the duct 16 to supplement the flow through the duct 9 into the chamber` 11. Y water level check. n.

Within the chamber 11 is auxiliary lining of 55k asbestos or as a compressible packing or seat 17 'exceedingthe supply to 'in steam ypressure in in temperature.

Pet cock 15' may be used as al "for rigid insulation iining, is. This liningA 1s,

*whichy is desirably of heat resistantglass, is shown vasprovided' with intake ports 19 to primaryf heat-y ing chamber 20{, with discharge portl 21 to auxiliary chamber 22 having liquid level determining pet Qock 2a., 'i 'i l Riser line 24'fromthe chamber22,` has circulatioril balancing return orby-passv25v back to the chamber 11. i In the event of ascending iiow y the chamber 11, the line v25 mayA balance the circuit by return'fiowthereto'. In the v`event the demand or free flow upward from the riser -24 is greaterl than thel supply thereto from the Achamber 22,"thelline v25 mayboact to. supplement" the 110W, although with liquid of less `high temperature forftlfleflow circuit. j

Y The llii'ie 'i 24` is here shown as y extending Vinto preheater:chamber3,l there toenvelop the coil 2',

yand then pass thereirom'by line'26 for ilow past the manually operable valve 2'7 to room heating 75 radiator 28. In this vapor heating installation, with valve 29, from the radiator 28 also open, the kcondensation may be conducted away by line 30 directly to the reservoir 6. For manually controlled iiow oir or maintaining vapor circuit flow,` even withrthe radiator 28 cut out, branch line 31 may be provided from the riser with adjustable `valve 32 therein thus to regulate the flow or spill, which may be conducted outside as a waste, or have sewer connection.

To care for the emergency of anysudden rise 'the circuit from the electric heater, automatic blow oi or adjustable safety valve 33 is provided. In the operation ofy the installation, excessive pressure rise in the reservoir 6 or return lines thereto beyond that required for normal operation, may be taken care of by adjustable safetyvalve 34 near the reservoir 6, with discharge, say to sewer connection. y For maintaining a predetermined heating con- 95 dition for the heating circuitthere maybe taken into account the maintenance of a pressure in the reservoir 6 by such circuit. A lowering of such heater vapor pressure would mean a drop Such reduced pressure in the` T100 reservoir 6 `reduces the volume of liquid forced upward into cylinder 35 against piston `36, and the piston rod 37 descends as urged downward by f lever 38 carrying weights 39. i

Fulcrum 40 mounts this control lever 38 on 105l the reservoir 6. This lever 38 in its shifting is effective at one limit forV cutting out allelectrodes,

and therefrom cutting in pairs of electrodesl 41 for the circuit. When in circuit, the electrodes 41, as parallel to each Vother complete the elec- 11@ tric circuit at the gap therebetween through the liquid being heated. With the jump for such gap for the electrodes in the liquid to be heated, there is found desirability in practice as to eiliciency in the conversion of the electric energy into heat in the liquid. Furthermore, the electrical insulation of the region of the gap from the conductor surfaceas holding the liquid for maintaining the electrodessubmerged,r is an additional lfactor for eilciencyof this flash boiler hereunder. liquid pressure holding insulation plate 42. Electric current supply conduit 43 extends to manually operable cutting in switch 44,` and lfrom thence has conduit 45 to the pressure controlled switch at the lever 38 and to the Vinsulation head or plate 42 at the heater. f

In a hot water installation, the electric is effective beyond the steam generation for vapor circuit promotion, in that water from line 46' past one-way valve 47 ows up into primary heating chamber 48 having electrical insulation lining 49. yThis water. incoming. now submerges the ,electrodesv 41 to provide electric circuit at the gap in. generating steam to create anv expansion of' the contents of' the chamber 48,. pulsating aow past one way valve'50 into riser line 2'4 for supply to the heating radiator 28 with return ow of the line 30. in communication with ex-` pansion tank 51'. The line 30. has the line 46 connected thereto, so there is maintained, supply effective as theexpansion clears the liquid from the terminals or electrodes 41 in the chamber 49. With the current. opened between the electrodes 41 by such steam generation to force liquid past `the `check valve 50, there isa drop in temperature in `the chamber 48 as well. as a drop in pressure.` opens the valve 47 for replenishing liquidv viow to, again fill. the cham- The electrodes 41 are assembledA iny heater ber 48 for electric heating action. There may be one or more pairs of these electrodes in a common chamber or boiler; there may be chambers in parallel or in series. With the chamber depending, instead of upstanding, there is defeated the pulsating action. There is thus provided hereunder an automatic electric heating and pumping of the heated liquid into the circuitin a simple and positively effective manner forrate of flow which may be regulated by the heating action of the electrodes, or by the check valves.

vWhat is claimed and it is desired to secure by f Letters Patent is:

l. A heating apparatus comprising a radiator and a duct" forming a continuous circuit, a branch from said duct providing a chamber closed against fluid passage thereinto except through said branch, and electrodes disposed in said chamber having an electric circuit therethrough completed by liquid flow from said circuit through said branch into said chamber to have apart of the liquid gasifled to create a pressure in said chamberfor forcing `the liquid `back through said branch into the. circuit.

2. A heating apparatus comprising a radiator and .aduct forming. a continuouscircuit, a branch from said .duct providing a chamber closed against fluid. passage thereinto except through said branch, electrodes disposed in said chamber having an electricv circuit. therethrough completed by liquid, flow from. said circuit through said branch into said chamber to have a part of the liquid gasied. to create a. pressure in said chamber for forcing the liquid back through said branch `into the circuit, andk av check valve in said circuit maintaining one-way ow therethrough.. g y

- RALEIGH B. POINDEXTER. 

